First pass at basic functionality.

This PR introduces the beginnings of Sprint Padawan.

Reviewed-on: #1

templates/vote_form.html

@@ -0,0 +1,15 @@
+{{$userVote := .UserVote}} {{$roomID := .RoomID}} {{$storyID := .Story.ID}}
+<div class="vote-form" id="vote-form-{{$storyID}}">
+    {{range scaleToOptions .Scale}}
+    <button
+        type="button"
+        hx-post="/rooms/{{$roomID}}/vote"
+        hx-target="#vote-form-{{$storyID}}"
+        hx-swap="outerHTML"
+        hx-vals='{"story_id":"{{$storyID}}","value":"{{.}}"}'
+        class="vote-option {{if eq . $userVote}}vote-selected{{end}}"
+    >
+        {{.}}
+    </button>
+    {{end}}
+</div>